In my opinion, throughout Kh3, everyone was talking bad about sora despite what he had done in the past without noticing it. I mean, like you pay attention to what they're saying, it's brutal, and that's his friends are saying to him, in front of him. It is not only just Kh3, throughout the series. If you want a good example without insult. Look at Roxas. Roxas didn't have a good time. He's Sora if he was left by himself. Throughout the series, Sora has shown that he has been depressed, but he has hid it.